package com.sunny.t4;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int[] data = new int[n];
        for(int i=0;i<n;i++){
            data[i] = scanner.nextInt();
        }

        System.out.println(0);

    }

}
